Air dump-car



C. H. DOW.

AIR DUMP GAR.

' No. 479,253. Patented July 19,-18 9Z..

a/ q WU WQW 7 UNITED STATES PATENT OFFICE.

CHARLES H. DOW, OF ELLENSBURG, ASSIGNOR OF ONE-SIXTH TO JAMES GARVEY AND HARRY L. SMITH, OF TACOMA, WASHINGTON.

AIR DUMP-CAR.

SPECIFICATION forming part of Letters Patent No. 479,253, dated J'u1y 19, 1892.

Application filed January 8, 1892. Serial No. 417,440. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES H. Dow, a citizen of the United States, residing at Ellensburg, in the county of Kittitass and State of Washington, have invented a new device known as the Oar-Dump, consisting of a device for dumping a car or train of cars by air or steam applied to a piston, each car being so hung that when it is dumped it will automatically return to its normally-lowered condition by reason of its preponderating weight, as will be hereinafter described and specifically claimed.

Figure 1 is a view, partly in perspective, of a car in a dumped condition; Fig. 2, a vertical transverse section of the car in a normal adjusted-position; Fig. 3, a sectional view in the line 3 3 of Fig. 2; Fig. 4, a detail view of the cylinder, inlet and outlet pipes, and the piston; and Fig. 5 is a detail view of the means of attachment of the dumping-sections of the car to the car-frame.

Each section E E is constructed like a box with the top or cover removed, the outer side being stationary to allow the load to pass under it and off the car to the ground when the inner sides of the sections are raised by the action of the air upon the piston. The sides H H are fastened to the bottoms of the sections, are covered with metal, and cut to a feather-edge on top, as shown in Fig. 2, to prevent any part of the load from falling between the sections. The pivoting-boxes E E are fastened to the pivot-sill J, each pivotsillJ being furnished with a casting M, fitting and pivoting into castings L L, attached to transom-bars K K K K, thus affording a continual support and pivot throughout the length of the car, the truss-rods N N aiding in supporting the car when loaded.

What I claim is- A dumping-car and means for dumping the same, comprising in its construction a car having stationary sides and ends and formed with two dumping-sections E E, which are inclosed by the stationary sides of the car and pivoted to the frame of the car near their outer edges, said sections being provided With inclined inner sides H H, which meet at a point when the sections are in a normally-adjusted posit-ion,thereby preventing coal, stone, or debris getting in between the two sections and preventing the sections operating, an air or steam conducting pipe B, a cylinder A, and piston F, which works against the under side of the inner ends of the sections and raises the same, said sections being so pivoted that when the load is dumped they automatically return to their lowered condition, substantially as described.

O. H. DOW.

Witnesses:

JAMES GARVEY, HARRY L. SMITH. 

